Merge pull request #11 from googlefonts/postproc_script
Update postproc script and instructionspull/401/head^2
Rod
GitHub
commit
cf08fde618
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@ -23,11 +23,14 @@ contains emojicompat metadata.
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cp build/NotoColorEmoji-noflags.ttf ../fonts/Noto-COLRv1-noflags.ttf
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```
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1. Post-process COLRv1 font for Android
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1. Post-process COLRv1 fonts
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* Adds some additional sequences, fixes up `name`, etc
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* At time of writing only the noflags version is for Android
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```shell
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# Assumed to be in a python3 environment with requirements.txt fulfilled
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python colrv1_postproc.py colrv1/build/NotoColorEmoji-noflags.ttf \
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PATH_TO/NotoColorEmojiCompat.ttf
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python colrv1_postproc.py
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```
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1. Add emojicompat metadata to the Android font and pass to the Android team
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* TODO write detailed instructions
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@ -1,5 +1,7 @@
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"""
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Post-nanoemoji processing of the Noto COLRv1 Emoji file.
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Post-nanoemoji processing of the Noto COLRv1 Emoji files.
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Adds additional sequences to properly support Safari, corrects 'name', etc.
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For now substantially based on copying from a correct bitmap build.
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"""
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@ -18,9 +20,10 @@ from pathlib import Path
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from colrv1_add_soft_light_to_flags import add_soft_light_to_flags
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_OUTPUT_FILE = {
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"NotoColorEmoji-noflags.ttf": "fonts/Noto-COLRv1-noflags.ttf",
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"NotoColorEmoji.ttf": "fonts/Noto-COLRv1.ttf",
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_CBDT_FILE = Path("fonts/NotoColorEmoji.ttf")
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_COLR_FILES = {
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Path("fonts/Noto-COLRv1-noflags.ttf"),
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Path("fonts/Noto-COLRv1.ttf"),
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}
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@ -32,14 +35,6 @@ def _is_cbdt(font):
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return "CBDT" in font
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def _is_compat_font(font):
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return "meta" in font and "Emji" in font["meta"].data
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def _copy_emojicompat_data(colr_font, cbdt_font):
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colr_font["meta"] = cbdt_font["meta"]
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def _set_name(name_table, nameID):
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name_table.getName(value, nameID, 3, 1, 0x409)
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@ -94,7 +89,7 @@ def _add_cmap_entries(colr_font, codepoint, glyph_name):
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if not _is_bmp(codepoint) and table.format == 4:
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continue
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table.cmap[codepoint] = glyph_name
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print(f"Map 0x{codepoint:04x} to {glyph_name}, format {table.format}")
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#print(f"Map 0x{codepoint:04x} to {glyph_name}, format {table.format}")
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FLAG_TAGS = set(range(0xE0030, 0xE0039 + 1)) | set(range(0xE0061, 0xE007A + 1))
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@ -113,7 +108,7 @@ def _map_missing_flag_tag_chars_to_empty_glyphs(colr_font):
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hmtx_table = colr_font["hmtx"]
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glyph_order_size = len(glyf_table.glyphOrder)
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for cp in tag_cps:
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print(f"Map 0x{cp:04x} to a blank glyf")
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#print(f"Map 0x{cp:04x} to a blank glyf")
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glyph_name = f"u{cp:04X}"
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assert glyph_name not in glyf_table, f"{glyph_name} already in glyf"
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assert glyph_name not in hmtx_table.metrics, f"{glyph_name} already in hmtx"
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@ -288,47 +283,39 @@ def _add_fallback_subs_for_unknown_flags(colr_font):
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font_data.delete_from_cmap(colr_font, [UNKNOWN_FLAG_PUA])
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def main(argv):
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if len(argv) != 3:
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raise ValueError(
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"Must have two args, a COLRv1 font and a CBDT emojicompat font"
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)
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def _font(path, check_fn, check_fail_str):
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assert path.is_file(), path
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font = ttLib.TTFont(path)
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if not check_fn(font):
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raise ValueError(path + check_fail_str)
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return font
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colr_file = Path(argv[1])
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assert colr_file.is_file()
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assert colr_file.name in _OUTPUT_FILE
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colr_font = ttLib.TTFont(colr_file)
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if not _is_colrv1(colr_font):
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raise ValueError("First arg must be a COLRv1 font")
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cbdt_file = Path(argv[2])
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assert cbdt_file.is_file()
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cbdt_font = ttLib.TTFont(cbdt_file)
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if not _is_cbdt(cbdt_font) or not _is_compat_font(cbdt_font):
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raise ValueError("Second arg must be a CBDT emojicompat font")
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def main(_):
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cbdt_font = _font(_CBDT_FILE, _is_cbdt, " must be a CBDT font")
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print(f"COLR {colr_file.absolute()}")
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print(f"CBDT {cbdt_file.absolute()}")
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for colr_file in _COLR_FILES:
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colr_font = _font(colr_file, _is_colrv1, " must be a COLRv1 font")
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_copy_emojicompat_data(colr_font, cbdt_font)
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_copy_names(colr_font, cbdt_font)
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print(f"Updating {colr_file} from {_CBDT_FILE}")
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# CBDT build step: @$(PYTHON) $(PUA_ADDER) "$@" "$@-with-pua"
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map_pua_emoji.add_pua_cmap_to_font(colr_font)
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_copy_names(colr_font, cbdt_font)
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_add_vs_cmap(colr_font)
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# CBDT build step: @$(PYTHON) $(PUA_ADDER) "$@" "$@-with-pua"
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map_pua_emoji.add_pua_cmap_to_font(colr_font)
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_map_missing_flag_tag_chars_to_empty_glyphs(colr_font)
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_add_vs_cmap(colr_font)
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add_soft_light_to_flags(colr_font)
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_map_missing_flag_tag_chars_to_empty_glyphs(colr_font)
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_add_vertical_layout_tables(cbdt_font, colr_font)
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add_soft_light_to_flags(colr_font)
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_add_fallback_subs_for_unknown_flags(colr_font)
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_add_vertical_layout_tables(cbdt_font, colr_font)
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out_file = Path(_OUTPUT_FILE[colr_file.name]).absolute()
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print("Writing", out_file)
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colr_font.save(out_file)
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_add_fallback_subs_for_unknown_flags(colr_font)
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print("Writing", colr_file)
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colr_font.save(colr_file)
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if __name__ == "__main__":
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